243155214013 has 4 divisors (see below), whose sum is σ = 243201649500. Its totient is φ = 243108778528.

The previous prime is 243155213993. The next prime is 243155214023. The reversal of 243155214013 is 310412551342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193563041764 + 49592172249 = 439958^2 + 222693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243155214013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243155214023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23209888 + ... + 23220361.

It is an arithmetic number, because the mean of its divisors is an integer number (60800412375).

Almost surely, 2^243155214013 is an apocalyptic number.

It is an amenable number.

243155214013 is a deficient number, since it is larger than the sum of its proper divisors (46435487).

243155214013 is an equidigital number, since it uses as much as digits as its factorization.

243155214013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46435486.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 243155214013 its reverse (310412551342), we get a palindrome (553567765355).

The spelling of 243155214013 in words is "two hundred forty-three billion, one hundred fifty-five million, two hundred fourteen thousand, thirteen".